27260996821 has 2 divisors, whose sum is σ = 27260996822. Its totient is φ = 27260996820.

The previous prime is 27260996779. The next prime is 27260996839. The reversal of 27260996821 is 12869906272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17745969796 + 9515027025 = 133214^2 + 97545^2 .

It is a cyclic number.

It is not a de Polignac number, because 27260996821 - 2¹⁵ = 27260964053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27260996881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13630498410 + 13630498411.

It is an arithmetic number, because the mean of its divisors is an integer number (13630498411).

Almost surely, 2^27260996821 is an apocalyptic number.

It is an amenable number.

27260996821 is a deficient number, since it is larger than the sum of its proper divisors (1).

27260996821 is an equidigital number, since it uses as much as digits as its factorization.

27260996821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 27260996821 in words is "twenty-seven billion, two hundred sixty million, nine hundred ninety-six thousand, eight hundred twenty-one".